Disable unreliable Gitea Godot cache steps

Gitea cache restores were inconsistent and cache saves timed out or were
rejected as reserved by another job. Remove the cache steps and keep direct
4.7.2 downloads; document the evaluation and when to retry. The workflow is
otherwise clean (no .github/ci.yml exists).

.gitea/workflows/build.yml

@@ -7,10 +7,6 @@ on:
   pull_request:
   workflow_dispatch:
 
-env:
-  GODOT_VERSION: "4.7.2"
-  GODOT_BIN: /usr/local/bin/godot
-
 jobs:
   checks:
     name: Import + headless tests
@@ -21,18 +17,8 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
-      - name: Restore Godot binary cache
-        uses: actions/cache@v4
-        with:
-          path: /usr/local/bin/godot
-          key: godot-checks-${{ runner.os }}-${{ env.GODOT_VERSION }}-v2
-
       - name: Install Godot 4.7.2
         run: |
-          if [ -x /usr/local/bin/godot ]; then
-            godot --version
-            exit 0
-          fi
           curl -sL -o /tmp/godot.zip \
             https://github.com/godotengine/godot/releases/download/4.7.2-stable/Godot_v4.7.2-stable_linux.x86_64.zip
           unzip -qo /tmp/godot.zip -d /tmp/godot-bin
@@ -71,38 +57,15 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
-      - name: Restore Godot binary cache
-        uses: actions/cache@v4
-        with:
-          path: /usr/local/bin/godot
-          key: godot-build-${{ runner.os }}-${{ env.GODOT_VERSION }}-v2
-
-      - name: Restore export templates cache
-        uses: actions/cache@v4
-        with:
-          path: ~/.local/share/godot/export_templates/4.7.2.stable
-          key: godot-templates-${{ runner.os }}-${{ env.GODOT_VERSION }}-v2
-
       - name: Install Godot 4.7.2 and export templates
         run: |
-          if [ ! -x /usr/local/bin/godot ]; then
-            curl -sL -o /tmp/godot.zip \
-              https://github.com/godotengine/godot/releases/download/4.7.2-stable/Godot_v4.7.2-stable_linux.x86_64.zip
-            unzip -qo /tmp/godot.zip -d /tmp/godot-bin
-            sudo install /tmp/godot-bin/Godot_v4.7.2-stable_linux.x86_64 /usr/local/bin/godot
-          fi
+          curl -sL -o /tmp/godot.zip \
+            https://github.com/godotengine/godot/releases/download/4.7.2-stable/Godot_v4.7.2-stable_linux.x86_64.zip
+          unzip -qo /tmp/godot.zip -d /tmp/godot-bin
+          sudo install /tmp/godot-bin/Godot_v4.7.2-stable_linux.x86_64 /usr/local/bin/godot
           godot --version
           TEMPLATE_DIR="$HOME/.local/share/godot/export_templates/4.7.2.stable"
           NEEDED="version.txt icudt_godot.dat linux_release.x86_64 windows_release_x86_64.exe macos.zip web_nothreads_release.zip web_dlink_nothreads_release.zip"
-          missing=0
-          for file in $NEEDED; do
-            [ -f "$TEMPLATE_DIR/$file" ] || missing=1
-          done
-          if [ "$missing" -eq 0 ]; then
-            echo "export templates restored from cache"
-            ls "$TEMPLATE_DIR" | head -10
-            exit 0
-          fi
           curl -sL -o /tmp/templates.tpz \
             https://github.com/godotengine/godot/releases/download/4.7.2-stable/Godot_v4.7.2-stable_export_templates.tpz
           rm -rf /tmp/tpl && mkdir -p /tmp/tpl